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Title |
Strengthening Effect of Reinforced Concrete Beams Strengthened with NSM CFRP Reinforcements and Various Reinforcement Details
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Keywords |
탄소섬유 ; 표면매립 ; 외부부착 ; 보강효과 ; 등가단면 ; CFRP ; NSMR ; EBR ; strengthening effect ; equivalent section |
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Abstract |
This paper contains the experimental results on strengthening effect of RC beams strengthened with NSM CFRP reinforcement and various strengthening details. A total of 14 beams have been tested to analyze strengthening effects of NSMR with various reinforcement details. Variables were cross-sectional shape of CFRP reinforcements, strengthening areas, grooves the number and location etc. Test results revealed that failure modes of NSMR showed two types. One was bond failure at interface between concrete and filler and the other was CFRP rupture. Also, failure mode of specimens with two grooves occurred premature bond failure because of superposition of failure surfaces at concrete around grooves. failure mode of MI specimens considered the equivalent section have changed bond failure to CFRP rupture and CFRP efficiency has improved 83% to 100%.
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